Vidar Gundersen, located in Asker outside Oslo, Norway.
I'm mapping my local area and hiking trails around Oslo, Fredrikstad and Løten.
I'm maintaining Mapnik style sheets for rendering (1) a hiking map with trails marked by DNT, (2) a skiing map with cross-country skiing tracks prepared by Skiforeningen, and (3) the screen cartography created by the Norwegian Mapping Authority.
See it at http://www.openstreetmap.no/
Hiking maps for singletrack mountain biking
Tagging trails: I mostly use highway=path (which deprecates highway=footway for rural use) and highway=track. I supply extra information with trail_visibility=*, sac_scale=*, trailblazed=yes, surface=grass,ground,dirt,mud,peet,rock,pebblestone,gravel,boulders,wood, access=*, (foot=*, bicycle=*) tracktype=<grade1-5>, piste:type=nordic, and information=guidepost.
Allow inaccurate mapping, but label shortcomings, e.g. "I know (but not from looking at a map) there is a trail here, but I have no GPS/tracklog", and mark such data for validation. Current solutions are using source=survey, knowledge, extrapolation, Yahoo, Landsat, fixme=continues, resurvey, stub, position, note=*, Proposed features/Internal quality.
See also my notes for a "WikiProject Norway/Hiking maps for singletrack mountain biking use-workshop".